One Rep Max Calculator

Below is a one-rep max calculator – you focus on the athlete/lifting and we’ll take care of the maths.

Enter the weight lifted and reps into the grey box and we’ll calculate the 1RM and various other sub-maximal weightings based on the most commonly used sport science methods.

To find out why we have set out our calculator in this way click here.

The design behind this 1 RM calculator

As coaches and sport scientists we need to test athletes in a safe and meaningful way. Testing 1 rep maxes can be dangerous, therefore we often use submaximal testing in order to estimate 1RM levels for a given lift.

We then wish to create a plan at an athlete’s 1 RM, or at 80, 70, or 60% of an athlete’s 1RM. This 1 RM calculator allows you to enter an athlete’s submaximal data and quickly find out 1 RMs and lower percentages of that 1 RM.

How useful was this post?

Click on a star to rate it!

Average rating 5 / 5. Vote count: 1

No votes so far! Be the first to rate this post.

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

| Website | + posts

Will is a sport scientist and golf professional who specialises in motor control and motor learning. Will lecturers part-time in motor control and biomechanics, runs Golf Insider UK and consults elite athletes who are interested in optimising their training and performance.